Journal
PRECISION AGRICULTURE
Volume 15, Issue 5, Pages 523-531Publisher
SPRINGER
DOI: 10.1007/s11119-014-9350-0
Keywords
Active optical sensing; Thermal infrared; Normalised difference vegetation index; Simple ratio index; Plant and soil moisture status
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Funding
- CRC for Spatial Information (CRCSI) under the Australian Government Cooperative Research Centres Programme
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An integrated active optical, and passive thermal infrared sensing system was deployed on a low-level aircraft (50 m AGL) to record and map the simple ratio (SR) index and canopy temperature of a 230 ha cotton field. The SR map was found to closely resemble that created by a RapidEye satellite image, and the canopy temperature map yielded values consistent with on-ground measurements. The fact that both the SR and temperature measurements were spatially coincident facilitated the rapid and convenient generation of a direct correlation plot between the two parameters. The scatterplot exhibited the typical reflectance index-temperature profile generated by previous workers using complex analytical techniques and satellite imagery. This sensor offers a convenient and viable alternative to other forms of optical and thermal remote sensing for those interested in plant and soil moisture investigations using the 'reflectance index-temperature' space concept.
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